Dyeing apparatus.



m. maze. A "Patanted Dec. 30, 1902.

J. 0. OBERMAlE-R.

DYEING APPARATUS.

(Application filed. Sept. 7,1900? Anew-sum I.

(No Model.)

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No. 7l6,926. Patented Dec. 30, i902.

J. 0. O-BERMAIER.

DYEING APPARATUS.

(Application filed Sept. 7, 1900.)

4 Sheets-Sheet 2.

(No Model.)

Tu: uonms warms w puoru-umq. WASNKNGTON. n n

No. 7l6,926. Patented Dec. 30, I902.

J. 0. UBERMAIEB.

ova-us APPARATUS. (Applicatign flledfiept. 7, 1900.) (No Model.) 4Sheets-Sheet 3.

Nirnn STATES ATENT OFFICE.

JULIUS OTTO OBERMAIER, OF LAMBREOHT, RHEINPFALZ, GERMANY.

DYEING APPARATUS.

SPECIFICATION forming part of Letters Patent N 0. 716,926, datedDecember 30, 1902.

Application filed September '7, 1900. ficrial lie-29,336. (No model.)

To all whom it may concern:

Be it known that I, JULIUs OTTO OBER- MAIER, a subject of the King ofBavaria, re

tions, as more fully describedv hereinafter.

Figs. 2, 4, and 6 are respectively sectional views showing the cocks indifterentpositions.

For some time past sulfureous very alkaline dyestuffs have been employedon alarge scale, such dyestuffs containing considerable quantities ofsulfid of sodium.- Materials dyed with these dyestuffs cannot be treatedin the hitherto usual manner by centrifugal machines, because theconsiderable admission of air produced by the centrifugal actionsepgofiarates the dyestuff dissolved in the dye in such a degree thatnoxious mechanical deposits of dyestuffs are produced upon the fiber.Moreover, these dyestuffs require for the rinsing process after thedyeing operation has been finished a sudden overflowing with freshwater. Owing to the great alkalinity the supply of rinsing-water must bevery energetic and take place under pressure, and correspondingly theevacuation of the waters having passed through the goods must take placewithout any interruption. In order to attain in dyeing with suchdyestuffs the best practical results, I have devised the apparatusillustrated in the accompanying drawings, wherein known means are used,(dyeing by means of liquors in circulation, employment of three-Waycooks for controlling the flow of the liquor;) but, notwithstanding, bya particular combination of these elements effects are obtained whichrepresent an essential technical progress.

As shown in Fig. 7, there are arranged between the pump a and adye-vat 1) two three way cocks, one of which (the cock) 0 is inserted inthe suction-pipe, and the other cock, d, in the forcing-pipe between thepump and the vat. The cock 0 is in communication by means of a pipe dwith a water-reservoir,while to the cock d there is connected a verticalpipe 6, through which the dyeing liquor is led to the reservoir f. g isthe water-supply cock at the top of the dyeing-vat, and h the lowerwater-outlet cock.

Dyeing pr0cess.-This device works as follows: The cocks o and d are inthe position shown in Figs. 1 and 2. The dyeing is effected as generallyknownthat is to say, the cylinder 70, section Fig. 7, is placed in thevat b above the cone upon the outlet-mouth of the pump and screwed tothe spindle. The vat is then filled with water up to the upper border ofthe cylinder, the pump is started, and all the air contained in thematerials is thus expelled by the circulation of the water. The dyestuifis then added, and the dyeing takes place. As the dye liquor extendsabove the cylinder and all the perforations are under water-i. a, underthe dye liquor--no air can enter during the working. If the dye liquorextends, for instance, only to half the height of the cylinder, it wouldbe decomposed-i. e., the dyeing-stuff would be eliminated-because itwould be continuously in contact through the great quantity of holesprovided in the outer circumference of the cylinder with the outer air.This would be, by way of example, the same as in the case of rain-drops,which falling to the ground are surrounded with air. After the dyeingprocess is terminated the three-way cock (1 in the pressure-tube isturned through ninety degrees, (see Figs. 3 and 4,) and in consequencethe dyeing liquor is sucked off by the working pump from the dyeing-vatand forced through the vertical tube 6 into the dye-reservoir f. Afterthis has taken place, the cook 01 is returned into its first position.This lasts about half a minute.

Recovery of the dyestufi" in excess.-In order to obtain very deeptinges, it is necessary to prepare very concentrated dye liquors whereonly a part of the dyestuff is to be brought upon the material, whilethe larger quantity remains in the bath. In order to work in a rationalmanner, it is necessary to recover and to use again the liquor forfurther dyeing. This recovery must be accomplished very quickly,because, as above mentioned, the dye liquor when the material comes intointimate contact with air, as it is the case in the centrifugal andcompressing operation, is decomposed, so that inequalities of the tingeand staining are produced. For this purpose the Working is as follows:The Water-cock g is opened, the vat is filled, and the cock shut offagain. The pump is started and all the fibers are rinsed over with coldwater. This dilute dye liquor is then pumped by turning the cook 01through ninety degrees (see Figs. 3 and 4) through the ertical pipe 6into the reservoir f. After this has been done this cock is returnedinto its first position. (See Figs. 1 and 2.) By this operation I attainbesides the necessary rinsing over of the material, moreover, thatnearly all the dyestuff still contained in the goods-i. 6., in the dyeliquoris recovered. This recovery of the dyestuff is in economicalrespect of great importance.

For carrying out finally the rinsing process the cock 0 in thesuction-pipe of the pump is turned, as shown in the Figs. 5 and 6, intosuch a position that the suction-head of the pump rests shut off fromthe receiver 1). The fresh Water passes from the Water-reservoir throughpipe 11 and cock 0 directly to the pump and is forced by the latterthrough the material and flows off through the outlet-cock h of thereceiver. As by shutting off the suctionpipe used rinsing-water cannotreturn to the parts immediately after the dyeing process;

third, a very complete and rapid rinsing.

I claim- The combination with a dye-vat, of a pump, a suction-pipeleading from the vat to the pump, a three-way cock in said pipe, awatersupply pipe connected to said three-way cook, a delivery-pipeleading from the pump'to the vat, a three-way cock in saiddelivery-pipe, a reservoir for dye liquor, a pipe leading from thethree-way cock in said delivery-pipe to discharge into said reservoir, abranch pipe leading from the water-supply pipe to discharge into thevat, a pipe leading from the said reservoir to discharge into the vat, acock to control thelast-named pipe and the branch pipe, and adischarge-pipe leading from the Vat, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

JULIUS OTTO OBERMAIER.

Witnesses:

JACOB HAYN, KARL LAUBsoHER.

